@J Dubbs, Do you have one of the new Razrs? I only ask because on mine which used to have the option when I had T-Mobile prepaid (and I sorely needed it with T-mo,) the WiFi calling option is now missing with AT&T. I’m actually fine without it as signal is fantastic at home where I used to need it with T-Mobile. But certainly curious about it. It is also an unlocked phone. I’ve noticed several quirks with the AT&T experience so far that I’ve never experienced with any other service provider so wouldn’t be surprised if this was their doing.
My larger concern would be in an area like a cabin by the river where signal is real bad and not being able to make a call.